The DDE setting should be used for text-based applications that do not communicate with the clipboard. DDE is the preferred method to use with text-based applications. DDE should be used and only if this fails should the clipboard method be used. In order to configure the DDE tab, you need to know the Service, Service Topic, and Topic Item for screen contents and cursor positions. These may be listed in the drop-down lists; otherwise, check server references and input manually.
Another use for the DDE setting is if you want to configure multiple hotspots on a text-based application that could potentially have the same value. Without the use of the DDE setting, the first instance of the value scraped would be used. Using the DDE option can help identify where on the screen the value was scraped from.
Click OK when you have completed configuration.